<!-- Licensed under a BSD license. See license.html for license -->
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
    <title>Three.js - Primitives</title>
    <style>
    html, body {
        height: 100%;
        margin: 0;
    }
    #c {
        width: 100%;
        height: 100%;
        display: block;
    }
    </style>
  </head>
  <body>
    <canvas id="c"></canvas>
  </body>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>

<script type="importmap">
{
  "imports": {
    "three": "../../build/three.module.js",
    "three/addons/": "../../examples/jsm/"
  }
}
</script>

<script type="module">
import * as THREE from 'three';
import {FontLoader} from 'three/addons/loaders/FontLoader.js';
import {TextGeometry} from 'three/addons/geometries/TextGeometry.js';

function main() {
  const canvas = document.querySelector('#c');
  const renderer = new THREE.WebGLRenderer({canvas});

  const fov = 40;
  const aspect = 2;  // the canvas default
  const near = 0.1;
  const far = 1000;
  const camera = new THREE.PerspectiveCamera(fov, aspect, near, far);
  camera.position.z = 40;

  const scene = new THREE.Scene();
  scene.background = new THREE.Color(0xAAAAAA);

  {
    const color = 0xFFFFFF;
    const intensity = 1;
    const light = new THREE.DirectionalLight(color, intensity);
    light.position.set(-1, 2, 4);
    scene.add(light);
  }
  {
    const color = 0xFFFFFF;
    const intensity = 1;
    const light = new THREE.DirectionalLight(color, intensity);
    light.position.set(1, -2, -4);
    scene.add(light);
  }

  const objects = [];
  const spread = 15;

  function addObject(x, y, obj) {
    obj.position.x = x * spread;
    obj.position.y = y * spread;

    scene.add(obj);
    objects.push(obj);
  }

  function createMaterial() {
    const material = new THREE.MeshPhongMaterial({
      side: THREE.DoubleSide,
    });

    const hue = Math.random();
    const saturation = 1;
    const luminance = .5;
    material.color.setHSL(hue, saturation, luminance);

    return material;
  }

  function addSolidGeometry(x, y, geometry) {
    const mesh = new THREE.Mesh(geometry, createMaterial());
    addObject(x, y, mesh);
  }

  {
    const loader = new FontLoader();
    // promisify font loading
    function loadFont(url) {
      return new Promise((resolve, reject) => {
        loader.load(url, resolve, undefined, reject);
      });
    }

    async function doit() {
      const font = await loadFont('/examples/fonts/helvetiker_regular.typeface.json');   /* threejs.org: url */
      const geometry = new TextGeometry('three.js', {
        font: font,
        size: 3.0,
        height: .2,
        curveSegments: 12,
        bevelEnabled: true,
        bevelThickness: 0.15,
        bevelSize: .3,
        bevelSegments: 5,
      });

      addSolidGeometry(-.5, 0, geometry);

      const mesh = new THREE.Mesh(geometry, createMaterial());
      geometry.computeBoundingBox();
      geometry.boundingBox.getCenter(mesh.position).multiplyScalar(-1);

      const parent = new THREE.Object3D();
      parent.add(mesh);

      addObject(.5, 0, parent);
    }
    doit();
  }

  function resizeRendererToDisplaySize(renderer) {
    const canvas = renderer.domElement;
    const width = canvas.clientWidth;
    const height = canvas.clientHeight;
    const needResize = canvas.width !== width || canvas.height !== height;
    if (needResize) {
      renderer.setSize(width, height, false);
    }
    return needResize;
  }

  function render(time) {
    time *= 0.001;

    if (resizeRendererToDisplaySize(renderer)) {
      const canvas = renderer.domElement;
      camera.aspect = canvas.clientWidth / canvas.clientHeight;
      camera.updateProjectionMatrix();
    }

    objects.forEach((obj, ndx) => {
      const speed = .5 + ndx * .05;
      const rot = time * speed;
      obj.rotation.x = rot;
      obj.rotation.y = rot;
    });

    renderer.render(scene, camera);

    requestAnimationFrame(render);
  }

  requestAnimationFrame(render);
}

main();
</script>
</html>

